Builder s scaffold or mortar-board



(No Model.)

S.-DALE. BUILDERS SGAFIOLD 0R MORTAR BOARD. I No. 283,214. Egtsnted Aug, 1 ,1883- 5%? CZWMM INVENTOR.-=

UNITED STATES PATENT OFFICE.

SAMUEL DALE, OF BOONESBOROUGH, IOWVA.

BUILDERS SCAFFOLD OR MORTAR-BOARD.-

SPECIFICATION forming part of Letters Patent No. 283,214, dated August 14, 1883.

Application filed July 5, 1883. (No. model.)

To all whom it may concern/.-

Be it known that I, SAMUEL DALE, a citizen of the United States, and a resident of Boonesborough, in the county of Boone and State of Iowa, have invented certainnew and useful Improvements in Builders Scaffolds or Mor tar-Boards; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification, and in which- Figure l is a side view of my improved builders scaffold or mortar-board, showing the legs or supporting -standards extended. Fig. 2 is an end 'view of the same. Fig; 3 is a bottom plan view of the scaffold with the legs in a closed position. Fig. 4is a cross-sectional View 011 line a: a, Fig. 3 and Fig. 5 is a detail view-0f one of the winged washers.

Similar letters of reference indicate corresponding parts in all the figures.

My invention has relation to builders scaffolds or mortar-boards, adapted to be used by masons, pla'sterers, painters, and others, which are constructed to operate upon the lazy-tongs principle; and it consists in the detailed construction and combination of parts of the same, as will be hereinafter more fully described and claimed. 4

In the accompanying drawings, A represents the top board of the scaffold, .to the under side of which the cross-pieces B B and the pieces 0 O, which latter extend only halfin the upper ends of the legs, and inserted I into the cross-pieces B B and the two pieces 0 O, as will readily be understood by reference to the drawings.

H represents a metal rod passingthrough the slots F in the middle part of each of the legs, and provided at one end with a head to L L represent washers placed between the ends of the tubular brace J and the sides of the legs D and E.

M M represent washers, which are provided with wings M M, one .edge of each of the wings being beveled and sharpened, as shown in Fig. 5. These washers are placed upon the rod H, one between the legs D D" and the other between the legs E E, the beveled wings M M on the said washers being adapted to cutinto the meeting sides of the legs D D and E E when the nut I is turned to tighten the frame, thereby binding the legs between which they are placed together, so as to act as an additional support when the scaffold is secured at a low height, or. when a heavy load is placed upon the said scaffold. The lower edges of the cross-pieces B B are cut out or recessed at their center for the reception of the brace J when the legs are shut down or closed.

By constructing my .improved builders scaffold or mortar-boardin-the manner described I am not only enabled to extend and close the legs so as to vary the height of the also adjust the length of each leg separately to fit any inequality of the ground, and also incline the scaffold at any desired angle to suit the position of the workman. When closed the scaffoldoccupies but little space, while the rounded brace J can be used as a handle in lifting it from place to place.

From the foregoing description, taken in connection with the accompanying drawings, the construction of my improved builders scaffold or mortar-board will readily beun- 'derstood without requiring further explana tion.

' It will be seen that my improved scaffold or scaffold above the ground or floor, but I can mortar-board is simple in construction, exceedingly convenient to use, and, being devoid of all complicated mechanism, will stand rough usage without breaking or getting out of order.

Having thus described my invention, I claim and desire to secure by Letters Patent of the United States- The combination of the top A, having crosspieees I B and pieces 0 0, adjustable legs I) D and IG E, provided with longitudinal slots F F, bolts G, connecting-rod H, washers M M, having beveled wings M M, and arranged. as described, tubular brace J, S111."

rounding the central part of the connecting;- rod, and'nut I, having handle I, and adapted to work upon the screw-threaded end of the connecting-rod I-I, all constructed and combined substantially as and for the purpose shown and described.

In testimony that I claim thev foregoing as my own I have hereunto affixed my signature in presence of two witnesses.

SADIUIGL DALE.

\Vitncsses:

A. J. BARKLEY, .IAs. Ros n LTNcoLN. 

